Hot wheels at the Frankfurt Motor Show

Peugeot Fractal Concept

The new Peugeot Fractal Concept is presented during the media day at the Frankfurt Motor Show in Frankfurt, Germany, on Sept. 15, 2015. The show runs through Sept. 27.

Credit: REUTERS/Kai Pfaffenbach

Peugeot Fractal Concept

The Peugeot Fractal Concept is presented during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Ferrari California T

A Ferrari California T car is on display at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: DANIEL ROLAND/AFP/Getty Images

Golf GTI Sport

A Golf GTI Sport is on display at the VW stand at the 2015 Frankfurt Motor Show on Sept. 15, 2015.

Credit: Hannelore Foerster/Getty Images

BMW 7 Series

The new BMW 7 Series is presented during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Hyundai Vision G

A model poses with a Hyundai Vision G car during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Borgward BX7

The Borgward BX7 SUV is presented during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Ralph Orlowski

Alfa Romeo Giulia

An Alfa Romeo Giulia car is pictured during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Opel Astra

General Motors CEO Mary Barra presents the new Opel Astra during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Opel Astra

The new Opel Astra is presented during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Citroen Cactus

A fair hostess poses by the Citroen "Cactus" concept car with its inflatable roof at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: ODD ANDERSEN/AFP/Getty Images

Jaguar F Pace

A Jaguar F Pace is on display at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: AP Photo/Michael Probst

Jaguar F Pace

A Jaguar F Pace is on display at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Renault Kadjar

A Renault Kadjar is on display at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: AP Photo/Michael Probst

Infiniti Q30

An Infiniti Q30 is pictured during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Citroen Aircross

A Citroen Aircross concept car is pictured during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Maserati Quattroporte

Maserati Quattroporte cars are pictured during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Thunder Power

The Thunder Power electric car from Taiwan is presented during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Hyundai N50

The Hyundai N50 is presented during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Fiat 500

Models present the new Fiat 500 during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Peugeot 308 R Hybrid

A model poses next to the Peugeot 308 R Hybrid during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Bentley Mulsanne Speed

An emblem is pictured on the bonnet of Bentley Mulsanne Speed during the media day at the Frankfurt Motor Show on Sept. 15, 2015.

Credit: REUTERS/Kai Pfaffenbach

Mercedes "Digital Transformer"

Daimler CEO Dieter Zetsche stands in front of a Mercedes-Benz concept car, the "Digital Transformer," during an event of the Daimler group on the eve of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: AP Photo/Michael Probst

Mercedes "Digital Transformer"

The Mercedes-Benz "Digital Transformer" concept car is displayed during an event of the Daimler group on the eve of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: AP Photo/Michael Probst

Mercedes-Benz F 015

The front of an autonomous concept car, the Mercedes-Benz F 015 Luxury in Motion, is pictured at the booth of Mercedes-Benz during the media day at the Frankfurt Motor Show on Sept. 14, 201

Credit: REUTERS/Ralph Orlowski

Mercedes-Benz F 015

The Mercedes F 015 appears on stage during an event of the Daimler group on the eve of the Frankfurt Auto Show on Sept. 14, 2015.

Credit: AP Photo/Michael Probst

Mercedes-Benz F 015

The Mercedes-Benz F 015 Luxury in Motion concept car is pictured at the booth of Mercedes-Benz during the media day at the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Ralph Orlowski

Mercedes-Benz S-Class S500

A new Mercedes-Benz S-Class S500 convertible, left, is pictured at the booth of Mercedes-Benz during the media day at the Frankfurt Motor Show on Sept. 14, 2015. The new Mercedes C-class coupe is seen at right.

Credit: REUTERS/Ralph Orlowski

Mercedes-Benz AMG Vision Gran Turismo

An employee cleans the Mercedes-Benz AMG Vision Gran Turismo car during the media day at the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Ralph Orlowski

Lamborghini Huracan LP 610-4 Spyder

The Lamborghini Huracan LP 610-4 Spyder is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

SEAT Leon Cross Sport

The SEAT Leon Cross Sport is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Bentley Bentayga

A Bentley Bentayga is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Bentley Bentayga

Bentley CEO Wolfgang Duerheimer presents the Bentley Bentayga during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Bugatti Vision

A Bugatti Vision concept car is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Bugatti Vision

A Bugatti Vision concept car is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Bugatti Vision

A Bugatti Vision concept car is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Audi e-tron Quattro

The new Audi e-tron Quattro is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Audi e-tron Quattro

The new Audi e-tron Quattro is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Tesla Model S

Employees cover a Tesla Model S car during the media day at the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Mercedes-Benz G500

A woman looks at the new Mercedes-Benz G500 4x4 SUV during the media day at the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Ralph Orlowski

Smart cars

Smart cars by Brabus are seen in line during the media day at the Frankfurt Motor Show on Sept. 14, 2015.

Credit: REUTERS/Kai Pfaffenbach

Porsche Vision E

A Porsche Vision E is presented during a Volkswagen group event on the eve of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: AP Photo/Jens Meyer

Porsche Vision E

A Porsche Vision E is presented during a Volkswagen group event on the eve of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: AP Photo/Jens Meyer

Porsche 911 Carrera S Coupe

A Porsche 911 Carrera S Coupe is presented during a Volkswagen group event on the eve of the Frankfurt Motor Show on Sept. 14, 2015.

Credit: AP Photo/Jens Meyer

Volkswagen Tiguan

The Volkswagen Tiguan is presented during a Volkswagen group event ahead of the Frankfurt Motor Show on Sept. 14, 2015.